Huawei UPS5000-E Series User Manual page 137

UPS5000-E-(20 kVA-160 kVA)
User Manual (Low voltage)

Retain default settings for Chg. cur. limiting coef. and Cell float voltage. Only
professional maintenance personnel are allowed to change the settings.

When you set parameters, ensure the following: Chg. cur. limiting coef. >
Transfer-to-equalized charging cur. coef.

Single batt. float chg. voltage deviation alarm thres. and Single batt. dis. voltage
deviation alarm thres. are used to check whether the batteries in each battery string have
the same charge voltage and discharge voltage. When a value exceeds the specified range,
an alarm is generated. The calculation formula is (Charge/Discharge voltage – Average
voltage)/Average voltage x 100%. The charge/discharge voltage and average voltage are
obtained from the BMU. If the BMU is not configured, these two parameters do not need
to be set.
Table 4-16 Battery settings
Item
Float volt.
temp. comp.
Float volt.
temp. comp.
coef.
(mV/(° C· cell))
Float Chg
temp. comp.
center (° C)
Automatic
equalized
charging
Transfer-to-eq
ualized
charging cur.
coef. (C10)
SOC to start
equalized
charging (%)
Scheduled
equalized
charging
interval (d)
Equalized
Issue 03 (2020-04-27)
Description
If this parameter is set to Enable,
the float voltage is calibrated
based on the battery temperature
when a battery temperature
sensor is connected. The
parameter is configurable in any
mode.
Calibration coefficient during
float voltage temperature
compensation.
Indicates the reference
temperature during temperature
compensation of the float
charging voltage.
If this parameter is set to Enable,
the UPS automatically changes
the battery management status to
equalized charge based on the
charge current and float charge
time.
The battery enters equalized
charge state when the battery
current exceeds this parameter
value.
If the SOC is lower than the
specified value, batteries start
equalized charging.
After batteries transfer from
equalized charging to float
charging, if the batteries do not
discharge, equalized charging
starts only after the float charging
time reaches Equalized
Copyright © Huawei Technologies Co., Ltd.
4 User Interface
Default Value Value Range
Enable Disable, Enable
3.3 0.0–6.0
25 20–30
Enable Disable, Enable
0.05 0.02–0.08
70 0–100
60 30–180
7 0–15
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